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Correlation of Electrolyte Volume and Electrochemical Performance in Lithium-Ion Pouch Cells with Graphite Anodes and NMC532 Cathodes

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.1131706jes· OSTI ID:1423447
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The work herein reports on studies aimed at exploring the correlation between electrolyte volume and electrochemical performance of full cell, pouch-cells consisting of graphite/ Li1.02Ni0.50Mn0.29Co0.19O2 (NMC-532) as the electrodes and 1.2 M LiPF6 in ethylene carbonate:ethylmethyl carbonate (EC:EMC) as the electrolyte. It is demonstrated that a minimum electrolyte volume factor of 1.9 times the total pore volume of cell components (cathode, anode, and separator) is needed for long-term cyclability and low impedance. Less electrolyte results in an increase of the measured ohmic resistances. Increased resistance ratios for charge transfer and passivation layers at cathode, relative to initial values, were 1.5–2.0 after 100 cycles. At the cathode, the resistance from charge transfer was 2–3 times higher than for passivation layers. Differential voltage analysis showed that anodes were less delithiated after discharging as the cells were cycled.
Research Organization:
Argonne National Laboratory (ANL)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technology
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1423447
Journal Information:
Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 6 Vol. 164; ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English

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Cited By (6)

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End-of-Life Prediction of a Lithium-Ion Battery Cell Based on Mechanistic Aging Models of the Graphite Electrode journal January 2018
Automotive Li-Ion Batteries: Current Status and Future Perspectives journal January 2019
Design and Demonstration of Three-Electrode Pouch Cells for Lithium-Ion Batteries journal January 2017
Degradation Mechanisms and Mitigation Strategies of Nickel-Rich NMC-Based Lithium-Ion Batteries journal October 2019
High-performance sodium-ion batteries with a hard carbon anode: transition from the half-cell to full-cell perspective journal January 2019

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Related Subjects

Cycle life
Electrolyte volume
High Voltage
Lithium-ion
Resistance
full pouch cell